DD2 caught chicken pox off DD1 about 2 weeks after I first seen spots on DD1. So spots were just fading on DD1 and they were erupting on DD2.
I kept both off them off nursery and away from Playgrops, we did go round to their friends house as the mum wanted her son to get chickenpox, and he didnt get. But apart from that I pretty much carried on as normal, went out shopping and went to see relatives.
Its only dangerous for Pregnant women that havent had chickenpox and most of the population has had chicken pox at some time in their lift.